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  • Where does energy come from in the body?

  • Energy comes from the three main nutrients carbohydrates, protein, and fats, with carbohydrates being the most important energy source. In cases where carbohydrates have been depleted, the body can utilise protein and fats for energy. Your metabolism is the chemical reactions in the body鈥檚 cells that change this food into energy.

  • What is fat stored as energy in the body?

  • Fat is stored in cells called adipocytes, and is broken down for energy through a process called metabolism. Protein, carbohydrates and fats are the three essential nutrients that provide the body with caloric energy. Although carbohydrates are the main source of energy for the body, fats are the most energy dense of these nutrients.

  • How is energy supplied to muscle cells in the body?

  • Energy is supplied to all cells including muscle cells by ATP generated from carbohydrates, fats and proteins .The unit of energy in the cells is called ATP (Adenosine Triphosphate) The body have 4 methods to create ATP, they vary by speed and whether they burn oxygen or not. These are listed 1-4 below;

  • How are calories stored in the body for future use?

  • Any calories that are not immediately metabolized for energy are stored in the body as fat for future use. Fat is stored throughout the body in fat cells known as adipocytes. The number of adipocytes an individual has is determined by late adolescence and rarely changes during adulthood.

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